Composite sewing machine with single needle for lock and overloc

Details Composite sewing machine with single needle for lock and overloc Composite sewing machine with single needle for lock and overloc

1989-01-03

1990-11-06

Falik, Andrew M.

Sewing

Stitch forming

Convertible

112162, 112199, 112221, 112288, D05B 120, D05B 5706

Patent

active

049676776

ABSTRACT:
A composite sewing machine has a lock stitch mechanism and an over-lock stitch mechanism. A switching mechanism is connected to the stitching mechanisms for switching the operation of the sewing machine between a lock stitch operation and an over-lock stitch operation. The machine has a single needle carrying element, a needle position converter for changing the position of the needle carrying element laterally of the stitching direction and including a needle bar connecting stud engaging the needle carrying element and a fulcrum shaft on which the stud is rotatably mounted for pivotal movement to change the vertical orientation of the needle carrying element between a lock stitch position and an over-lock stitch position which are adjacent to each other and juxtaposed laterally on the sewing machine. The over-lock stitch mechanism has an upper looper and a lower looper at the over-lock stitch position, a looper driving mechanism connected to the loopers and including a clutch connecting the driving mechanism to the over-lock stitch mechanism, whereby one needle is adapted to be used for both lock stitching and over-lock stitching.

REFERENCES:
patent: 4267786 (1981-05-01), Hanyu et al.
patent: 4690080 (1987-09-01), Mikuni et al.
patent: 4799439 (1989-01-01), Koshinaka et al.

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